参数资料
型号: IDT71256SA25PZGI
厂商: IDT, Integrated Device Technology Inc
文件页数: 2/8页
文件大小: 0K
描述: IC SRAM 256KBIT 25NS 28TSOP
标准包装: 234
格式 - 存储器: RAM
存储器类型: SRAM - 异步
存储容量: 256K (32K x 8)
速度: 25ns
接口: 并联
电源电压: 4.5 V ~ 5.5 V
工作温度: -40°C ~ 85°C
封装/外壳: 28-TSSOP(0.465",11.8mm 宽)
供应商设备封装: 28-TSOP
包装: 托盘
其它名称: 71256SA25PZGI
IDT71256SA
CMOS Static RAM 256K (32K x 8-Bit)
Pin Configurations
Commercial and Industrial Temperature Ranges
Absolute Maximum Ratings (1)
Symbol
Rating
Value
Unit
A 14
A 12
A 7
A 6
A 5
1
2
3
4
5
28
27
26
25
24
V CC
WE
A 13
A 8
A 9
V CC
V TERM
Supply Voltage
Relative to GND
Terminal Voltage
Relative to GND
-0.5 to +7.0
-0.5 to V CC +0.5
V
V
A 4
A 3
A 2
6
7
8
SO28-5
P28-2
23
22
21
A 11
OE
A 10
T BIAS
T STG
Temperature Under Bias
Storage Temperature
-55 to +125
-55 to +125
o
o
C
C
A 1
A 0
I/O 0
9
10
11
20
19
18
CS
I/O 7
I/O 6
P T
I OUT
Power Dissipation
DC Output Current
1.0
50
W
mA
I/O 1
I/O 2
GND
12
13
14
17
16
15
I/O 5
I/O 4
I/O 3
2948 tbl 02
NOTE:
1. Stresses greater than those listed under ABSOLUTE MAXIMUM RATINGS
may cause permanent damage to the device. This is a stress rating only and
DIP/SOJ
2948 drw 02
Top View
functional operation of the device at these or any other conditions above those
indicated in the operational sections of this specification is not implied. Exposure
to absolute maximum rating conditions for extended periods may affect
reliability.
OE
22
21
A 10
A 11
A 9
A 8
A 13
23
24
25
26
20
19
18
17
CS
I/O 7
I/O 6
I/O 5
Truth Table (1,2)
CS OE WE
I/O
Function
WE
V CC
A 14
A 12
A 7
A 6
A 5
A 4
A 3
27
28
1
2
3
4
5
6
7
SO28-8
16
15
14
13
12
11
10
9
8
I/O 4
I/O 3
GND
I/O 2
I/O 1
I/O 0
A 0
A 1
A 2
,
L
L
L
H
V HC (3)
L
X
H
X
X
H
L
H
X
X
DATA OUT
DATA IN
High-Z
High-Z
High-Z
Read Data
Write Data
Outputs Disabled
Deselecte d - Standby (I SB )
Deselecte d - Standby (I SB1 )
2948 drw 02a
TSOP
Top View
Recommended Operating
Temperature and Supply Voltage
Grade Temperature GND Vcc
NOTES:
1. H = V IH , L = V IL , x = Don't care.
2. V LC = 0.2V, V HC = V CC –0.2V.
3. Other inputs ≥ V HC or ≤ V LC .
Recommended DC Operating
Conditions
Symbol Parameter Min. Typ. Max.
2948 tbl 03
Unit
Commercial
Industrial
0 O C to +70 O C
-40 O C to +85 O C
0V
0V
4.5V ± 5.5V
4.5V ± 5.5V
V CC
GND
Supply Voltage
Ground
4.5
0
5.0
0
5.5
0
V
V
2948 tbl 01
V IH
V IL
Input High Voltage
Input Low Voltage
2.2
-0.5 (1)
____
____
V CC +0.5
0.8
V
V
2
NOTE:
1. V IL (min.) = –1.5V for pulse width less than 10ns, once per cycle.
2948 tbl 04
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